package cn.aixuegao.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
 * 获取工程中的spring容器管理的bean
 * @author hxy
 *
 */
@Component
public class SpringBeanUtils implements ApplicationContextAware {

	/**
	 * 上下文对象
	 */
	private static ApplicationContext applicationContext;
	
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if(SpringBeanUtils.applicationContext == null) {
            SpringBeanUtils.applicationContext = applicationContext;
        }
	}

	/**
	 * 获取applicationContext
	 * @return
	 */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过name获取 Bean
     * @param name
     * @return
     */
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过class获取Bean
     * @param clazz
     * @return
     */
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     * @param name
     * @param clazz
     * @return
     */
    public static <T> T getBean(String name,Class<T> clazz){
        return getApplicationContext().getBean(name, clazz);
    }
	
}
